Feeding mechanism for sewing machines



R. M. SHARAF FEEDING MECHANISM FOR SEWING MACHINES Original Filed April 2, 1917 4 Sheets-Sheet 1 R. M. SHARAF FEEDING MECHANISM FOR SEWING MACHINES 4 Sheets-Sheet 2 Original Filed April 2, 1917 $3 42') attozwu m yq Dec. 16, 1924. 1,519,556

R. M. SHARAF FEEDING MECHANISM FOR SEWING MACHINES Original Filed April 2, 1917 4 Sheets-Sheet rs A TTORNEY Dec. 16, 1924. 1,519,556

R. M. SHARAF FEEIDING MECHANISM FOR SEWING MACHINES Original Filed April 2, 1917 4 Sheets-Sheet 4 INVENTOH 3 f Y gz z/wzwf 1J0. y! $152K 7% 12 @120 722- ATTORNEY.

Patented Dec. 16, 1924.

Fries.

ATE

RALPH M. SHARAF, OF BOSTON, MASSACHUSETTS, ASSIGNOB TO R. M. SHARAF MA- CHINE 00., OF BO'STON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

FEEDING MECHANISM FOR SEW'ING MACHINES.

Application filed April 2, 1917, Serial No. 159,057.

To all whom it may concern:

Be it known that I, RALPH M. Sl-IARAF, a citizen of the "United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented cer tain new and useful Improvements in Feeding Mechanism for Sewing Machines, of which the following is a specification.

The present invention relates to feeding mechanism for sewing machines, and particularly such a machine of the two-needle type, such machine being employed especially for the sewing of lace, insertion, or other auxiliary fabric into material. It is an object of the present invention to pro vide in such a machine independent feeding means for the material, and for the lace or insertion, each of the said means being controllable to automatically feed the material and the lace or insertion, the material being additionally controlled, so that the same may take either a straight or a curved direction and the proper number of stitches may be made. To this end, I propose to differentially feed the material in taking a curve so that, on the outer curve, the number of stitches to the inch will decrease, while on the inner curve the number of stitches will increase; in other words, the individual length of the stitches will increase on the outer side of the curve, and decrease on the inner side. In the particular example described in detail below, as suming the normal length of a stitch to be forty one-thousandths of an inch, the construction is such that with the parts in their extreme adjustment, the stitch length will be increased to forty-one one-thousandthg of an inch on the outer side of the curve, and decreased to thirty-seven onethousandths of an inch at the inner side of the curve. The increase of the stitch length on the outer side of the curve, and the de crease on the inner side, will be gradual as the parts are adjusted from the normal position to the extreme limit, and in any intermediate position the ratio of increase of stitch length on the outer side of the curve to decrease on the inner side will be the same as in the extreme position; thus in the example given, this ratio will have the constant value of 1 to 3. The lace is increasingly fed at a rate corresponding to the outer curve,

Renewed April 26, 1924.

the lace itself, however, being uniformly fed at both sides thereof.

Other objects are to provide such a machine, which may be accurately adjusted, which will be positive in operation, and in which the power and differential control means, for the feeding dogs are located in the upright support of the head. It is also an object to provide spiral gear means for driving the feed from the main drive shaft. It is a further object to provide special means for regulating the normal stitch prior to the change of the rate of the stitch, depending upon the control therefor.

lVith these and other objects in view, an embodiment of my invention is shown on the accompanying drawings, and more fully described with reference thereto, and the invention will be finally pointed out in the claims.

In the accompanying drawings,

Fig. 1 is a front view partly in elevation and partly in section, of a sewing machine embodying the present example of my invention,

F 2 is a side view of the knee control means, the base plate being shown in section along the line 22 of Fig. 1,

Fig. 3 is a horizontal sectional plan view of the head with parts broken away,

Fig. 4 is a plan View of the base plate with the head removed and with parts broken away,

Fig. 5 is a vertical sectional View of the uprigl'it support of the head showing the di'lfercntial mechanism,

Fig. 5* is a diagrammatic view showing the formation of the spiral control cam,

Fig. 5" is a view of the said cam,

Fig. 6 is a detail view of the control rod for the lace or insertion fabric feed,

Figs. 7 and 8 show in end view the lace feed, four positions of movement being shown in full and dotted lines,

Fig. 9 is a side view of the lace feeding bar and the operating means,

Fig. 10 is a detail plan view of the lace feeding mechanism,

Fig. 11 is a perspective view of the lace guide and feeding means, and

Fig. 12 is a similar view showing only the lace guide and retaining spring.

Similar reference characters indicate corresponding parts throughout the several figures of the drawings.

Referring to the drawings, the sewing machine, according to the present embodiment, comprises a base plate 20, provided with a head 21, in the usual manner, and having a main driving shaft 22 extending therethrough and provided at its outer end with a balance wheel 23 in the well-known. manner. Below the base there are provided the usual shuttles and shuttle saddle, but I have omitted these for the sake of illustrating the present improvements more clearly. Bearings 24 and 25 are provided in the head, in which is mounted an oscillating yoke member, which, through other mechanism hereinafter described, drives the differential dogs. This yoke shown in plan in Fig. 3 comprises an intermediate portion 26 having an arcuate slot 27 therein, (Fig. and provided with a yoke portion 28 extending upwardly therefrom, which engages an eccentric cam 29 carried by the drive shaft 22. At each side of the portion 26 a there are secured by bolts 30 and 31 supporting members 32 and 33 having bearings 34 and 35 respectively, in which are journalled the stub shafts 36 and 37 mounted in the bearings 24 and 25 formed in the head. The supporting members 32 and 33 are recessed intermediate the ends, providing spaces 38 and 39, at either side of the member 26 and the inner faces of these supporting members are provided respectively with grooves 40 and 41, corresponding in size and direction to the slot 27. It will be seen that by rotation of the driving shaft the yoke member will be oscillated.

Beneath the base plate of the machine, there is provided a rock shaft 42, supported between the bearings 43 and 44 at each end of the machine, and rotatable upon the shaft 42 there is mounted a concentric tubular rock shaft 45. Short laterally extending cranks 46 and 47 are provided on the rear ends of the said rock shafts 42 and 45, and at the forward ends short upstanding ends 48 and 49 are provided (Fig. 5), these latter being pivotally connected to the feeding dogs 50 and 51, and being adapted to re ciprocate the same. The other ends ofthe feeding dogs slidably engage blocks 52 of a lifting crank 53 mounted upon a shaft 54, extending beneath the base plate and operable from the counter shaft 55 by means of a fork 56 and cam 57. The counter shaft is rotated through an upright shaft 58 having spiral gears 59 and 60 thereon, (Fig. 1) respectively engaging spiral gears 61 and 62 on the main shaft 22 and the counter shaft. The cranks 46 and 47 are connected by feed bars 63 and 64 to the oscillating yoke member 26, the upper ends of said rods entering the spaces 39 and 38 respectively, and being provided with blocks 65 and 66 which enter at each side and slidably engage the slot 27 of the said member 26. The blocks are of such thickness as to pass each other in their movement in the said slot, and their supporting pins 67 and 68 have their outer ends disposed in the grooves 40 and 41 as clearly indicated in Figs. 3 and 5. The feedings dogs it will be seen, are reciprocated through the rock shafts 42 and 45 by the stroke or throw of the rods 63 and 64. When these rods are in alignment with each other the dogs move equally. When the po sitions thereof are varied, however, as indicated in Fig. 5, the dogs move differentially.

In order to bring about the differential movement of the dogs, a shaft 7 0 is mounted beneath the base plate of the machine between the bearings 71 and 72, this shaft being provided with a mitre gear 73. The gear 7 3 is engaged by a mitre gear74 upon the endof a transverse shaft 7 5 supported beneath the base plate, and adapted to be operated by a frame 76, having an extension 7 7 thereon, adjustable by meansof slots 77 and set screws 77", and to the forwardly extending end 7 8 of which is secured a knee yoke, comprising two angle pieces 79 and 80 adjustably connected by a set screw 7 8 passing through slots 7 9 and 80 of the said angle pieces, and permitting of the same being accurately fitted to the particular operators knee. Thus the shaft 70 may be turned in either direction by the knee without interfering in any way with the progress of the work.

A spiral segment shaped cam 81 is mounted upon the shaft 70, and is provided upon its faces with similarly shaped cam grooves 82 and 83 respectively. These grooves register at the center of the same and extend in opposed relation at each side from the registering or neutral point. At one side of the center these grooves extend with a slight rise from the concentric line of the cam, while at the other side the grooves drop, substantially three times the amount of the rise, the grooves at each side being within the same radial bounds. Figure 5 illustrates in detail the formation or lay-out of the spiral cam grooves 82 and 83 which are similar in form as above pointed out, and are placed in reverse relation on the respective sides of the cam plate. The plate is divided into four equal annular divisions, and radially into four divisions, the left hand segment being equal in angular extent to the three equal sized right hand segments. The groove follows the direction of the line A-B drawn through the points of intersection 1, 2, 3, 4 and 5, the rising part 1 to 2 having the relation of l to 3 to the dropping part 2 to 5 in radial extent.

A shaft 84 is provided in the head, at the lower portion thereof, upon which are mounted two bell crank levers 85 and 86,

IOU

provided at their upper ends with links and 88,, having sockets 89, therein in which are inserted the ball ends 91 and 92 of bolts 93 and 91 mounted in the feed rods (33 and 64, and provided with set-nuts 95 and 96. Grooves 97 are provided in the ends of the bolts, which permit of their being adjusted by means of a screw driver inserted through the opening 98 of the head. Thus a universal connection is provided between the feed rods 63 and 64 and the levers 85 and 86, so the feed rods may move upwardly and downwardly, the links moving about their pivots 87 and 88*, while movement of the levers will cause the feed rods 63 and 6a to move in the slot 27 of the yoke 26. The lower ends of the bell crank levers and 86 have rods 99 and 100 pivotally connected thereto, which extend downwardly at either side of the cam and are provided at their lower ends with slots 101 and 102 which engage the shaft 70, being held adjacent the cam by means of bearing rings 103 (Fig. 1) on the shaft 70. Pins 104: and 105 having anti-friction rollers 106 and 107 respectively mounted thereon, are provided at the inner sides of the rods 99 and 100, which rollers engage the respective cam grooves 82 and 83. In the central or neutral position of the cam, the rollers 106 and 10"- occupy the position indicated by dotted lines at 108, and in this case the position of the rod 99 is similar to that of the rod 100 and the positions of the two feed rods are likewise similar, so that an equal throw is imparted thereto, and the feeding dogs are moved equally, or each at the rate of forty one-t-housandths of an inch to the stitch, for example. This gives the normal adjustment for normal straight work. This adjustment can be changed to a different normal adjustment, depending upon the character of the work, and the normal stitch desired by the user. It will be seen that this adjustment can be readily made by simply turning the screws 93 and 9% with a screw driver.

When a curve is to be made, the operator moves the knee frame in one or the other direction, depending on the direction of the curve desired, thereby moving the cam 81. Assuming that the cam is moved to the position shown in Fig. 5 to its extreme at one side, the rod 99 occupying the groove 82 rises and through the lever 85 moves the feed rod 63 so that the block 65 is drawn to a greater distance from the pivotal point of the oscillating yoke member 26, thereby increasing the throw of the feed rod 63, and correspondingly increasing the movement of the feeding dog connected therewith. At the same time the rod 100 is moved downwardly by the dropping portion of the groove 83, this movement being substantially three times as great as the upward movement of the rod 100, and through the lever 80 moving the feed rod 64; nearer the pivot point of the yoke member 26, thereby decreasing the throw of the feed rod (i l, and also the movement of its feeding dog, the dog at the inner curve being almost at a stand still at the extreme movement of the cam shown in the drawings. As before pointed out, the ratio of decrease in the movement or stroke of one of the two rods to the increase in .the stroke of the other rod, is three to one. It will be understood that I do not wish to restrict myself to this particular ratio, and that the cam grooves 82, 83 may be plotted for any other desired ratio. For a curve in the other direction, the .cam is moved in the opposite direction, and the operation is exactly reverse, that is the rod 63 will be moved toward the pivot while the rod 6 1 is moved away.

Simultaneously with the feeding of the cloth, the lace or other auxiliary material is fed, and regulated according to the outer curve or the material, that is the outer edge of the lace will be fed to correspond to the increasing feeding of the material, while the inner edge which is sewed to the inner curve will be gathered. This feeding of the lace is accomplished by the mechanism now to .be described.

At the forward end of the drive shaft 22 there is provided a cam 110 which operates the thread take-up lever 111, pivotally mounted upon the head at 112. A pin 113 on the take-up lever engages one slotted end 11 1 of a lever 115 pivotally mounted at 116, the other slotted end 117 being engaged by a pin 118 carried at the upper end of a lace feeding bar 119, thereby reciprocating the said bar by the movement of the take-up lever 111.

The bar 119 feeds the lace upon the cloth through the presser foot,.as hereinafter more fully pointed out. The presser footis secured at slotted end of the presser foot bar 120, by the screw 120 and comprises a solid foot portion 1.2-0 which extends relatively close to the needles 150, and is provided at each side with plates 120 and 1.20 secured thereto by dowels 120 and screws 120 the said plates extending at each side of the needles and upwardly at the opposite side from the bar 120, and having a lace guide block 121 secured therebetween by screws 121 and 121 The inner curved surface of the lace feeding block 121 is spaced back from the edges of the plates so as to prevent the lateral displacement of the lace. A flat spring 122 is secured at its upper end to a bar 1.2.2 extending between the plates in spaced relation to the block 121, and is held in engagement with the block by a bar 122 so that a space is provided for the entrance of the lace and at the same time the lace is yieldably held. in ei'igagement with the block. The lower end of the spring is provided with cut out portions 122, which permit of enforwardly, the bar 119 does not act directly trance of. the lace feeding blade hereinafter referred to, therethrough.

Upon a bracket 123 of the head there is pivotally supported at 123 a swinging knuckle 124 provided at its lower end with an elongated slotted port-ion 12a, in which is adj ustably secured a screw 12 1 by means of a nut 124. A shoulder 124; is provided upon the screw which engages the portion 124, and between which and the head of the screw is pivotally supported a lever 125, the rear end 125 of which is bent laterally as clearly indicated in Fig. 10. A finger 125 inclined. upwardly is provided on the rear end of the lever 125 which slidablyengages a recess 119 of the lace feeding bar 119. The pivot point of the lever 125 it will be seen, may be adjusted in the slot of 12 1 by means of the adjustable screw 1249. A stud shaft 126 is provided on the portion 125* of the lever 125 intermediate its ends, and a blade support 127 is pivotally mounted thereon. At the lower end of the support 127 there is secured a lace feeding blade 127 provided with fingers 127 which are adapted to engage the lace through the recessed portions 122 of the spring 122. A hook portion 127 is provided above the bladein which the lower end of the lace feeding bar 119 rests, and at the upper end of the member 127, which is reduced at its upper portion as indicated in Fig. 9, there is provided a hook 127 between which and a stud 128 provided on the bracket 123there is disposed a spring 129 which normally" holds the lace feeding blade away from the block 121. Fig. 7 illustrates in full lines this normal po sition. V

The operation of the lace feeding means is as follows:

The bar 119 descends, first swinging the member 127 inwardly, about pivot 126 be cause of its engagement with hook 127 and swinging the fingers 127 of the lace feeding blade into engagement with the lace at a point above the lower extremity of the lace guiding block 121, as shown in dotted lines, Fig. 7-, this distance corresponding to the amount of lace to be fed. The spring 129 initially keeps the sharply inclined lever 125 against the top of the recess 119 but the bending of the thin resilient bar 119 forwardly as shown in the dotted lines, causes the top of the recess 119 to move away from the lever 125, so that it remains substantially in its original upward position. The length of the lace feeding blade 127 is made sufiiciently great, from the pivot 126 to the point of contact with the bar 119 to cause bar 119 to bend so far forwardly, as it rotates the member 127 about pivot 126 that the sole initial movement of the feeding device is the said rotation of member 127 because the top of the slot 119, being moved on the lever 125. The upward inclination of the finger125 causes the bar 119 to first rotate the member 127 until it contacts with the lace guide, before the lever 125 is rotated. Upon further movement of the bar 119, the lace is fed beneath the spring 122, the desired amount, as indicated in ,full lines in Fig. 8. As soon as the up stroke of the bar 119 begins, the spring 129 causes the end of the blade to move outwardly out of engagement with the lace, as indicated in dotted lines in Fig. 8, the holding spring 122 preventing any picking up of the lace by the blade, and upon the upward stroke of the bar 119, the blade is carried, if necessary, by

means of the engagement of the bottom of the slot 119 with finger 125 to its first position under the action of the spring 129 (full lines Fig. 7). Thus a positive and accurate feeding of the lace takes place.

When the member 119 is released, the spring 129 acts to remove the fingers 127 from the lace for the purpose that the lace should not be pulled back which has been fed. The fingers 127 have a spring action, and on their downward thrust bend slightly, hence after the thrust it is important that the spring effect be overcome, and this is done by the action of the spring 129.

In order to regulate the movement of the lace feeding bar 119, a crank lever 180 is pivotally mounted at 131 uponthe interior I of the head, said lever being connected by a rod 132 to a three cornered plate 133 pivoted at 134, and which is connected by a rod 135 to the pin 136 of a collar 137 carried by the cam shaft 70, (see particularly Fig. 6) this pin being vertically above the axis of the shaft in the neutral or normal position of the cam 81, and movable equally in either direction by the dog 137 to pull the rod 135 downwardly upon the rod 132 and swing the lever 130. The shaft 131"! of the lever 130 is provided exterior of the casing with a lever 130 (Fig. 3) which is connected by a rod 138 to a lever 139, mounted upon one end of a spindle 139, and upon the other end of which is provided a disk 140, to which is eccentrically connected a rod 141 pivotally connected at 1&2 to the swinging knuckle 124. Upon pulling of the rod 132, the rod 138 will be forced forwardly depressing the rod 14-1, and causing the knuckle124- to move inwardly. This inward movement of the pivot 126 of the member 127, will bring the end of the fingers 127 to a slightly higher point with relation to the block 121, so that upon operation of the bar 119 the fingers 127 engage the lace at a greater distance above the lowest extremity of the block 121, and thereby a greater amount of lace is fed to the stroke. This increased amount it will be understood, corresponds to the increased feed of the outer curve of the cloth in either direction, the lace being gathered at the inner curve during the sewing operation.

As the machine is designed for making parallel rows of stitches in either straight or curved lines, and the proper speed is automatically maintained for the inner and outer curves according to the movement of the operators knee, a single line drawn centrally of the work will serve as a pattern, so that an indicator following this line and movable with the variations in the feed of the lace will automatically indicate to the operator the proper movement to be imparted by the knee.

In Fig. l I have illustrated such an indicator. A bar 150 is pivotally mounted at 151 upon the head of the machine, the pivotal point being in a line perpendicular to the center line of the two rows of stitches, and extends downwardly to the base plate of the machine where it is provided with an indicating pointer 152. Intermediate its ends the bar 150 carries a pin 153 normally stationary in relation to said bar, but adjustable lengthwise thereof, and projecting into a slot 15a of the rod l ll, so that by movement of this rod in either direction through operation of the knee yoke, the pointer is moved correspondingly to either side of the center line. The adjustment of the pin 153 in the longitudinal slot of the bar 150 permits of accurately setting the pointer to move with the other parts of the machine. There it will be seen, that with a single line pattern upon the work, it is only necessary for the operator to follow this line with the pointer by movement of the knee yoke, and the differential feed mechanism will be automatically changed to effect the desired curvature of the work.

With my improved machine, the sewing of lace or insertion may be carried on in factories with the greatest accuracy, and in a manner which permits of the machine being operated practically continuously, allowing the operator to keep both hands in action at all times, while controlling the feed according to the direction which the design. takes, by means of the knee. The differential feed of the dogs results in a perfect curve having the proper number of stitches for the inner and outer edges of the curve, closely simulating hand work in appearance, and surpassing the same in perfectness.

The placing of the operating n'ieans in the head of the machine results in a compactness and accessibility and a more direct connection with the main shaft, which through spiral gears serves to drive the machine.

I have illustrated a preferred and satisfactory embodiment of my invention, but it is obvious that changes may be made therein within the spirit and scope thereof, as delined in the appended claims.

I claim:

1. A feeding mechanism for sewing machines, comprising two separate means for feeding material, and unitary mechanism adapted to control both feeding means to increase the speed of one of them while at the same time decreasing the speed of the other feeding means.

2. In a sewing machine, two separate feed ing mechanisms, each of variable speed, and cooperative adjusting means adapted to simultaneously control both mechanisms to increase the speed of one while decreasing the speed of the other, and vice versa.

3. In a sewing machine, two separate feeding means, each of variable speed, and unitary mechanism controlling both feeding means to increase the speed of one while at the same time decreasing the speed of the other feeding means, the ratio of sucl speed increase to such speed decrease being constant.

et. In a sewing machine, two separate feeding means, both of variable speed but of the same normal speed and unitary mechanism controlling both feeding means to increase the speed of one while at the same time decreasing the speed of the other feeding means, the constant ratio of such speed increase over the normal speed to such speed decrease below the normal speed being one to three.

A feeding mechanism for sewing ma.- chines, comprising a plurality of feed dogs adapted to engage the respective sides of the material to be fed, means for independently operating the said dogs, and means for controlling the rate of speed of said independently operating means to increasingly or decreasingly operate either of the respective means, the other of said means being respectively operated at a decreasing or increasing ratio thereto, and means for feed ing an auxiliary material, said means adapted to be varied to feed the auxiliary material at a. speed corresponding to the greatest speed of the other material at each par ticular time.

6. A feeding mechanism for sewing machines, comprising a main driving shaft, a plurality of feed dogs, means for independently operating said feed dogs, means operatively connecting each of said dog-operating means to said shaft, and means adapted to adjust simultaneously the op erative connections of both dog operating means to selectively increase the movement of one dog and decrease the movement of the other dog.

7 In a feeding mechanism for sewing machines, a main driving shaft extending through the head of the machine, a plurality of feed dogs, means for independently operating said feed dogs, means extending uprightly through the head of the machine operatively connecting said dog operating means to said driving shaft and common means for controlling both feed dogs to increase the speed of one of them, while at the same time decreasing the speed of the other feed dog.

8. A feeding mechanism for sewing machines, comprising a main drive shaft, extending through the head of the machine, a plurality of feed, dogs, means adapted to independently operate said feed dogs, an oscillating member disposed in the head of the machine, and adapted to be operated by said drive shaft, means connecting said dog operating means to said oscillating member, and means for adjusting the said last named means with respect to said oscillating memher to increase or decrease the effective movement of said dogs.

9. A feeding mechanism for sewing machines, comprising a main drive shaft, a plurality of feed dogs, means for independently operating said feed dogs, means eX- tending through the head of the machine operatively connecting said dog operating means to the main drive shaft, and means for controlling the effective movement of said connecting means to increasingly or decreasingly move the said dogs, said controlling means comprising oppositely disposed cams, means connecting said cams to said connecting means, each of said cams extending oppositely from a neutral point to increasingly move said connecting'means in one direction of movement from said neutral point, and decreasingly move said connecting means in the other direction of movement from said neutral point. I

10. A feeding mechanism for sewing machines, comprising a main drive shaft, a plurality of feed dogs, means for independently operating said feed dogs, means extending through the head of the machine operatively connecting said dog operating means to the main drive shaft, and means for controlling the effective movement of said connecting means to increasingly or decreasingly move the said dogs, said controlling means comprising oppositely disposed cams, means connecting said cams to said connecting means, each of said cams ex tending oppositely from a neutral point to increasingly move said connecting means in one direction of movement from said neutral point, and decreasin ly move said connect ing means in the other direction of move ment from said neutral point, and a knee yoke for moving said cam in either direction from said neutral point to increasingly or decreasingly operate said respectivedogs.

11. A feeding mechanism for sewing machines, comprising a main drive shaft, a plurality of feed dogs, means for independently operating said feed dogs, means extending through the head of the machine operatively connecting said dog operating means to said driving shaft, and means for controlling the effective movement of said connecting means, said controlling means comprlslng a shaft disposed beneath the base plate of said machine, cam means carone direction from said neutral point, and

to oppositely control the same in the other direction from said neutral point, means for feeding an auxiliary material to said other material, and means for controlling the said auxiliary feeding means corresponding to k the greatest feed of said dogs, said controlling means: comprising a cam on said last mentioned shaft, and means adapted to be operated equally in either direction of movement of said shaft to increase the effective movement of the said auxiliary feeding means.

12. In a sewing machine, two separate feeding means, each of variable speed, and unitary mechanism controlling both feeding means to increase the speed of one while at the same time decreasing the speed of the other feeding means in a ratio greater than the rate of increase in the speed of the firstnamed feeding means.

13. A feeding mechanism for sewing ma chines, comprising feeding dogs, means for independently operating said feeding dogs, a main drive shaft, an oscillating member mounted in the head of said machine adapted to be swung by said main drive shaft, said oscillating member being provided with a slot extending in one direction from the pivot point thereof, means independently connecting said dog operating means to said oscillating member, and means for adjusting the connection of said connecting means in the slot of said oscillatingmember to independently control the effective movement of said connecting means.

14. A feeding mechanism for sewing ma chines, comprising feed dogs, means for independently operating said feed dogs, a main drive: shaft, means operatively con necting said main drive shaft to said dog operating means, means for independently changing the effective movement of said. connecting means, means for manually adj'usting the connection between said last named means and connecting means.

15. A feeding mechanism for sewing machines, comprising feed dogs, a main drive shaft in the head of the machine, a countershaft extending beneath the base plate of the machine, and adapted to impart power to said dogs, a spiral gear on said main shaft, a spiral gear on said counter-shaft, and an upright shaft extending through the head of the machine and having spiral gears thereon engaging the respective spiral gears of the main and counter-shaft.

16. A feeding mechanism for sewing machines, comprising means for feeding material, and means for feeding aur-ziliary material to said other material, said means comprising a guide block, a pivoted feed member disposed above said guide block, and a reciprocating member movable relatively to the pivot of said feed member, and adapted to impart movement to said feeding member to move the said feeding member upwardly and dowmvardly with respect to said guide block.

17. A feeding mechanism for sewing ma chines, comprising means for feeding material, and means for feeding an auxiliary material to said other material, said means comprising a guide block, a laterally disposed member pivotally mounted at one end, a vertically disposed reciprocating member adapted to oscillate said laterally disposed member upwardly and downwardly, and a feeding member pivoted intermediate the ends of said late-rally disposed. member, adapted to be moved upwardly and downwardly with respect to said guide block.

18. A feeding mechanism for sewing machines, comprising means for feeding material, and means for feeding an auxiliary material to said other material, said means comprising a laterally disposed member pivoted at one end, a vertically disposed reciprocating member adapted to engage the ther end of said laterally disposed member to oscillate the same, and a feeding member pivotally mounted intermediate the ends of said laterally disposed member and engaged by said reciprocating member, and adapted to have a swinging and up and down movement imparted thereto by the movement of said reciprocating member.

19. A feeding mechanism for sewing machines, comprising means for feeding material, and means for feeding an auxiliary material to said other material, said means comprising a guide block, a laterally disposed member pivoted at one end, a verti- Cally disposed reciprocating member adapted to engage the other end of said laterally disposed member to oscillate the same, a feeding mein r pivotally mounted interme diate the ent of said laterally disposed member and engaged by said reciprocating member, and adapted to be swung inwardly at the initial movement of said reciprocating member into engagement with said guide block, and down *ardly upon said guide member upon the further downward move ment of said reciprocating member, and

spring means adapted to move said feeding member out of engagement with the said guide block upon the upward movement of said reciprocating member.

20. A feeding mechanism for sewing machines, comprising means for feeding material, and means for feeding an auxiliary material to said other material, said means comprising a guide block, a laterally disposed member pivoted at one end, a reciprocating member adapted to engage the other end to oscillate said laterally disposed member, and a feeding member pivotally mounted intermediate the ends of said laterally disposed member, said feeding member adapted to be moved into engagement with said guide block during the downward movement of said reciprocating member, and out of engagement during the'upward movement thereof, the adjustment of the pivot point of said laterally disposed member adapted to raise or lower the engagement point of said feeding member with respect to said guide block to increase or diminish the effective feeding movement thereof.

21. A feeding mechanism for sewing machines, comprising means for feeding material, and means for feeding an auxiliary material to said other material, said means comprising a swinging support, a laterally disposed member pivoted at one end to said swinging support, a reciprocating member adapted to engage the other end of said member to oscillate the same, a feeding member pivotally connected to the said laterally disposed member intermediate its ends, the effective movement of said feeding member adapted to be increased or diminished by inward or outward movement of said swinging support, and means for moving said swinging support.

22. A feeding mechanism for sewing machines, comprising differential feeding means adapted to be either increasingly or decreasingly operated, means for feeding auxiliary material adapted to be increasingly or decreasingly controlled according to the movement of that one of said first mentioned feeding means which has the greater movement at the time and indicating means connected to said means for controlling the said auXili-ary feeding means to move the said indicating means in either direction from a center line to correspond to the curve of the material effected by said differential feeding means. i

28. In a sewing machine, two cloth-feed .ing devices, each of variable speed, an adjusting mechanism controlling both devices to increase the speed of one of them while decreasing the speed of the other, means for feeding an auxiliary material at a variable speed, and an operative connection between said adjusting mechanism and the means for llli) feeding the auxiliary material, to vary the speed of the latter to correspond to the speed of that cloth-feeding device whose speed is greater at the time.

24. In a sewing machine, a drive shaft extending through the head of the machine, a feed dog, and means for operating said dog fromsaid shaft, said means including a connection extending uprightly through the head of the machine and adjusting means carried by said connection for controlling the movement thereof.

25. In a sewing machine, a drive shaft, a feed dog, an oscillating member disposed in the head of the machine and operated by said shaft, and means for operating said feed dog from said oscillating member, said means including a connection adjustable to ward and from the axis about which said member oscillates and also including an adjustable member and means connecting said member to said connection for adjusting said connection relatively to said axis, and means carried by said connection for adjusting the relation between said connection and said adjustable member.

26. In a sewing machine, a drive shaft, an oscillating member operated by said shaft and located in the head of the machine, and provided with an outwardly extending guideway, a feed dog, and means for operating said feed dog from said oscillating member, said means including a connection and a slide carried thereby adjustable along said guideway toward and from the axis of the oscillating member, and also an adjustable member and means connecting said member to said connection for adjusting said connection relatively to said axis, and means carried by said connection for adjusting the relation between said connection and said adjustable member.

27. In a sewing machine, a drive shaft, two feed dogs, and two separate mechanisms for operating said feed dogs from the drive shaft, each of said mechanisms being adjustable to vary the throw of the respective feed dog, adjusting devices for said mechanisms, and connected cams extending constantly outward relatively to the axis of the cams and disposed in opposite or crossed relation, each of said cams being in operaive engagement with one of said adjusting devices to cause at the same time an increase in the throw of one feed dog and a decrease in the throw of the other. i

28. In a sewing machine, a drive shaft, two feed devices, each of variable throw, individual means for adjusting the throw of one of said devices without altering the throw of the-other device, and additional means for causing an increase in the throw of one of said devices and a decrease in the throw of the other at the same time.

29. In a sewing machine, feed dogs,a drive shaft in the head of the machine, a counter-shaft extending beneath the base plate of the machine and adapted to operate said feed dogs, spiral gears on the drive shaft and on the counter-shaft, an upright shaft extending throughthc head of the machine and having spiral gears thereon engaging the respective spiral gears on the main shaft and counter-shaft and common controlling means adapted to produce variable speed of said dogs relatively to each other.

30. In a sewing machine, two feed dogs adapted to be normally operated at uniform speed, and unitary control means adapted to produce variable speed of both dogs each relative to the other. 5

31. A feeding mechanism for sewing machines, comprising two separate means for feeding material and common controlling means for both feeding means operable without interrupting the normal operation of the machine to increase the speed of one of thefeeding means while at the same time decreasing the speed of the other.

32. In a sewing machine, two feed dogs adapted to be normally operated at uniform speed and common controlling means for said dogs adapted to increase the speed of vone of them while decreasing the speed of the other and at any time without interrupting the normal operation of the machine.

33. The combination with a sewing machine having means for feeding material, of means for feeding auxiliary material to said first-mentioned material, said lastnamed means including a guide member, a feeding member disposed above the guide and mechanism including means for reciprocating saidfeeding member to move the same upwardly and downwardly with respect to the guide to feed the auxiliary material and having a part co-acting with said feeding member to positively engage the same with the auxiliary material before the commencement of the downward movement of the feeding member. I

34. The combination with a sewing machine having means for feeding material, of means for feeding auxiliary material to said first-named material, said means (011'1- prising a guide member, a pivoted feeding member disposed above the feed guide, means permitting said pivot to move longitudinally with the feeding member, and means for moving said feeding member longitudinally, said latter means initially. acting upon said feeding member to oscillate the same and to positively engage said member with the auxiliary material prior to the longitudinal movement of the member.

35. A feeding mechanism for sewing machines comprising two separate feeding deas my invention, I have signed my name in VlCGS and operating means therefor, and presence of two subsorlblng Witnesses. umtary means "for independently controlling the speed of operation oi the feeding de- RALPH M SHARAF. vices Without interrupting the normal oper- Htnesses: etion of the machine. D. LEWIS MATTERN,

In testimony that I claim the foregoing MAE M. VVEINBERG. 

